tunnelling-journal (1)
tunnelling-journal (1)
  • Home
  • Print
    • Subscribe
    • Tunnelling Journal
    • Breakthrough
    • ITA Activity Report
    • A&NZ Journal
    • WTC Preview
    • Media Kit
  • Digital
    • Newsletter
    • E-Shots
    • TJ Digital edition
    • Products Page
    • Media Kit
  • Conferences
    • BTS Conference and Exhibition
    • Cutting Edge 2022
  • Buyer’s Guide
  • Events Diary
  • Jobs
  • About Us
  • Contact Us
  • Podcast

Home > Chengdu Metro EPBM record

Chengdu Metro EPBM record

Tris Thomas

Written by Tris Thomas on 25/05/2010 in News

Tagged: underground

In March 2010, contractors celebrated a city-wide excavation record on the Chengdu Metro, of 457.5m in one month. The 6.26m diameter Robbins EPBM has excavated at rates of up to 24 m per day—faster than any of the 11 other TBMs working on the project. The machine began excavation of Line 2, Lot 18 of the Chengdu Metro in January 2010, as part of a project for the China Railway Construction Corp, Ltd. (CRCC).

By May, the machine had excavated approximately 1,000m of the 2.7km long tunnel, to be bored in two sections. Cutter wear was minimal, with no cutters changed since the start of boring. “These achievements are due to the strong support of field service during assembly, commissioning, maintenance, and excavation,” wrote Mr. Li Quanshe of CRCC.

The EPBM was designed to excavate a matrix of alluvial geology found nowhere else in China, consisting of highly permeable pebbles, sand, and clay. A mixed ground cutterhead, mounted with 17-inch diameter disc cutters and carbide bits, was manufactured specifically to effectively excavate the geology. A foam injection system stabilizes running ground, with each cubic meter of foam mixture able to stabilize about 40 rings of ground.  Subsidence is being intensively monitored and crews are trained to utilize probe drilling and ground consolidation if settlement is detected.

China’s Chengdu Metro will open in three stages, with Line 1 operational by 2010. The 26.7km long Line 1 will provide service between Honghuayan and Shiji Square stations at speeds of 80km/h. The 50.6km long Line 2, for Chengdu Metro LLC, (with 17.6 km of underground tunnels) will include 26 stations between Longquandong and Shiniu areas. Seven lines totaling 274km are planned to be operational by 2035, and will service 13.1 million daily passengers.

Comments:

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

Search

Digital Edition

More Like This

02/12/2022

Acciona awarded Stage 2 Western Harbour Tunnel contract

Acciona awarded Stage 2 Western Harbour Tunnel contract

Sydney’s historic third harbour crossing has reached another major milestone with the $4.24bn contract to deliver stage two of the…

16/12/2022

Surface depression monitored above Snowy 2.0 headrace

Surface depression monitored above Snowy 2.0 headrace

New South Wales’ Snowy 2.0 teams are monitoring a surface depression that has emerged above the project’s 17km long headrace…

24/02/2023

Ground Investigation drilling starts for Auckland Light Rail

Ground Investigation drilling starts for Auckland Light Rail

Physical works for New Zealand’s largest transport infrastructure project – Auckland Light Rail (ALR) – are underway with the start…

  • Contact Us
  • Media Kit
  • Magazine Archive

Newsletter

The latest from the Tunneling Journal direct to your inbox.

Social



Enquiries

TGS Media Ltd
The Old Library
Webster House
Dudley Road
Tunbridge Wells
TN1 1LE
United Kingdom

© Tunnelling Journal. All Rights Reserved. Privacy Policy / Terms & Conditions. Admin

We use cookies to ensure that we give you the best experience on our website. If you continue to use this site we will assume that you are happy with it.OkRead more